PatentsHGH: Dynamic Relation Between Patents and R&D
In Ecdat: Data Sets for Econometrics

PatentsHGH

R Documentation

Dynamic Relation Between Patents and R&D

a panel of 346 observations from 1975 to 1979

number of observations : 1730

observation : production units

country : United States

data(PatentsHGH)

A dataframe containing :

obsno: firm index
year: year
cusip: Compustat's identifying number for the firm (Committee on Uniform Security Identification Procedures number)
ardsic: a two-digit code for the applied R&D industrial classification (roughly that in Bound, Cummins, Griliches, Hall, and Jaffe, in the Griliches R&D, Patents, and Productivity volume)
scisect: is the firm in the scientific sector ?
logk: the logarithm of the book value of capital in 1972.
sumpat: the sum of patents applied for between 1972-1979.
logr: the logarithm of R&D spending during the year (in 1972 dollars)
logr1: the logarithm of R&D spending (one year lag)
logr2: the logarithm of R&D spending (two years lag)
logr3: the logarithm of R&D spending (three years lag)
logr4: the logarithm of R&D spending (four years lag)
logr5: the logarithm of R&D spending (five years lag)
pat: the number of patents applied for during the year that were eventually granted
pat1: the number of patents (one year lag)
pat2: the number of patents (two years lag)
pat3: the number of patents (three years lag)
pat4: the number of patents (four years lag)

Hall, Bronwyn, Zvi Griliches and Jerry Hausman (1986) “Patents and R&D: Is There a Lag?”, International Economic Review, 27, 265-283.

Cameron, A.C. and Trivedi P.K. (1998) Regression analysis of count data, Cambridge University Press, http://cameron.econ.ucdavis.edu/racd/racddata.html, chapter 9.

Cameron, A.C. and P.K. Trivedi (2005) Microeconometrics : methods and applications, Cambridge, pp. 792–5.